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Telesign website screenshot

Telesign

Telesign provides a comprehensive suite of communications and security APIs enabling businesses to verify phone numbers, send SMS, omnichannel and voice messages, and assess fraud risk. The developer portal publishes 22 OpenAPI contracts (65 operations) covering SMS Verify, Voice Verify, Silent Verify, App Verify and the multi-channel Verify API; Messaging (SMS, WhatsApp, Viber, RCS, MMS, email), Voice, Number Masking and Bulk SMS; Phone ID, Intelligence Cloud and Email Intelligence risk signals; and Accounts, Deactivated Numbers, Flow Builder and Protect Platform management surfaces, plus an RFC 9727 API catalog and callback (webhook) payload contracts.

agent ready

Reference-quality API operations across every facet — a rich contract, published governance, transparent operations, and machine-readable commercial terms.

Kin Score

API Evangelist profiles Telesign the way a machine reads it — 89 machine-readable artifacts across 28 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Telesign scores 72.0/100 (exemplar), with a separate agent-readiness read of 42/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.

Kin Score Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0
Telesign Kin Score — API readiness rating by API Evangelist

Put this on your own site. The badge is drawn live from Telesign's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.

<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/telesign/"
   title="Telesign on API Evangelist — API profile and Kin Score">
  <img src="https://apis.io/badge/telesign.svg"
       alt="Telesign Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>

More shapes, themes and sizes → · Score as JSON · How badges work

How we profile Telesign

Each block below is one kind of artifact we hold for Telesign. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 31

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

Individual APIs this provider publishes, each with its own machine-readable definition.

Telesign Accounts API

Use this API to programmatically manage your Telesign accounts and their configurations.

Telesign Deactivated Numbers API

Encoding: Accepts only UTF-8 encoded unicode characters as inputs. The Deactivated Numbers API can be used to get lists of deactivated numbers. These can be used to ensure you d...

Telesign Email Intelligence API

Email Intelligence API (1 operations): Email Intelligence - Submit an email address to evaluate.

Telesign Flow Builder API

The Flow Builder solution is designed to streamline the creation, execution, and management of transactional flows. By leveraging business rules and data from both internal and ...

Telesign API Keys API

The API Keys API from Telesign — 2 operation(s) for api keys.

Telesign Bulk SMS API

The Bulk SMS API from Telesign — 1 operation(s) for bulk sms.

Telesign Bulk SMS Callbacks API

The Bulk SMS Callbacks API from Telesign — 1 operation(s) for bulk sms callbacks.

Telesign Calls API

The Calls API from Telesign — 1 operation(s) for calls.

Telesign Completions API

The Completions API from Telesign — 1 operation(s) for completions.

Telesign Delivery Reports API

The Delivery Reports API from Telesign — 2 operation(s) for delivery reports.

Telesign Email Intelligence Extended Response API

The Email Intelligence Extended Response API from Telesign — 1 operation(s) for email intelligence extended response.

Telesign Finalize API

The Finalize API from Telesign — 4 operation(s) for finalize.

Telesign Initiate API

The Initiate API from Telesign — 2 operation(s) for initiate.

Telesign Intelligence API

The Intelligence API from Telesign — 2 operation(s) for intelligence.

Telesign Messages API

The Messages API from Telesign — 1 operation(s) for messages.

Telesign Messaging API

The Messaging API from Telesign — 4 operation(s) for messaging.

Telesign Messaging Callbacks API

The Messaging Callbacks API from Telesign — 6 operation(s) for messaging callbacks.

Telesign Number Masking API

The Number Masking API from Telesign — 2 operation(s) for number masking.

Telesign One-time passcodes API

The One-time passcodes API from Telesign — 1 operation(s) for one-time passcodes.

Telesign Phone ID API

The Phone ID API from Telesign — 3 operation(s) for phone id.

Telesign Phone ID Contact API

The Phone ID Contact API from Telesign — 1 operation(s) for phone id contact.

Telesign Phone ID Number Deactivation API

The Phone ID Number Deactivation API from Telesign — 1 operation(s) for phone id number deactivation.

Telesign Protect API Authentication API

The Protect API Authentication API from Telesign — 1 operation(s) for protect api authentication.

Telesign Recordings API

The Recordings API from Telesign — 2 operation(s) for recordings.

Telesign SMS API

The SMS API from Telesign — 3 operation(s) for sms.

Telesign SMS Callbacks API

The SMS Callbacks API from Telesign — 1 operation(s) for sms callbacks.

Telesign Templates API

The Templates API from Telesign — 2 operation(s) for templates.

Telesign Templates Callbacks API

The Templates Callbacks API from Telesign — 1 operation(s) for templates callbacks.

Telesign Transaction Status API

The Transaction Status API from Telesign — 2 operation(s) for transaction status.

Telesign Verification Process API

The Verification Process API from Telesign — 3 operation(s) for verification process.

Telesign Voice API

The Voice API from Telesign — 1 operation(s) for voice.

Scroll within the panel for all 31 ·

Open Collections 1

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

MCP Servers 1

Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.

Model Context Protocol servers that expose these APIs to AI agents.

Telesign developer portal MCP server (ReadMe-hosted)

developer.telesign.com is a ReadMe-hosted portal and serves ReadMe's MCP endpoint at /mcp under Telesign's own documentation domain. An unauthenticated JSON-RPC tools/list is re...

MCP SERVER

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Telesign Rate Limits

16 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

Cost, billing, and metering signals for API financial operations.

Event Specifications 1

Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

Telesign Context

3 classes · 5 properties

JSON-LD

Spectral Rules 2

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Telesign — jsonschema rules

6 rules · 5 warnings

SPECTRAL

Telesign API Rules

12 rules · 4 errors · 7 warnings

SPECTRAL

JSON Schema 40

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

Standalone JSON Schema definitions for this provider's data models.

200-av-response

5 properties

JSON SCHEMA

AccountDetails

2 properties

JSON SCHEMA

Account

0 properties

JSON SCHEMA

Action

2 properties

JSON SCHEMA

CallerIDAVResponse

5 properties

JSON SCHEMA

Carrier

2 properties

JSON SCHEMA

DeactResFileList

3 properties

JSON SCHEMA

FinalizeAVResponse

6 properties

JSON SCHEMA

GetAVStatusResponse

4 properties

JSON SCHEMA

getPhoneIdLiveResponse

9 properties

JSON SCHEMA

getPhoneIdNDResponse

5 properties

JSON SCHEMA

getPhoneIdResponse

9 properties

JSON SCHEMA

getStatusResponse

6 properties

JSON SCHEMA

GET Verification Response

9 properties

JSON SCHEMA

InitiateAVResponse

7 properties

JSON SCHEMA

NumMaskInputs

3 properties

JSON SCHEMA

OmniReqChannelObj

2 properties

JSON SCHEMA

OmniReqDetailsForRCS

2 properties

JSON SCHEMA

OmniReqDetailsForViber

2 properties

JSON SCHEMA

OmniReqDetailsForWA

2 properties

JSON SCHEMA

PatchVerificationStateResponse

1 properties

JSON SCHEMA

postEmailIDRequestBody

5 properties

JSON SCHEMA

postEmailIntResponse

5 properties

JSON SCHEMA

postPhoneIDRequestBody

5 properties

JSON SCHEMA

postScoreResponse

10 properties

JSON SCHEMA

postSMSSuccessResponse

0 properties

JSON SCHEMA

POST Verification request

7 properties

JSON SCHEMA

POST Verification Response

0 properties

JSON SCHEMA

putCompletionResponse

4 properties

JSON SCHEMA

Recording

4 properties

JSON SCHEMA

RecordingWithDetail

0 properties

JSON SCHEMA

RestAPIKey

0 properties

JSON SCHEMA

ScoreNumbering

2 properties

JSON SCHEMA

ScorePhoneType

2 properties

JSON SCHEMA

sendVoiceCodeResponse

0 properties

JSON SCHEMA

SharedResponseFields

2 properties

JSON SCHEMA

sharedResponseSchema

4 properties

JSON SCHEMA

SIMSwapResponse

4 properties

JSON SCHEMA

SVResponse

2 properties

JSON SCHEMA

Scroll within the panel for all 40 ·

JSON Structure 2

JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.

JSON Structure definitions describing this provider's data shapes.

Telesign Messaging Structure

0 properties

JSON STRUCTURE

Telesign Structure

0 properties

JSON STRUCTURE

Examples 3

Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.

Example request and response payloads for these APIs.

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Telesign Authentication

http/apiKey · 3 schemes

SECURITY

Telesign Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Telesign Trust Center

SOC 2, ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

Recommended x-agentic-access execution contracts for AI agents.

Telesign Agentic Access

63 operations · 44 acting

63 operations · 44 acting

AGENTIC

Resources

Every other property we hold for Telesign — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 3

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

Build 3

SDKs, sample code, and the tooling you integrate with

Other 4

Properties that don't map to a standard resource type

← All providers · Data indexed from github.com/api-evangelist/telesign · machine-readable index on apis.io

Where this information came from

This is an independent, third-party profile of Telesign, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.